One of my students asked me to explain parallax today. Argh! *think back to 6th form physics* Umm.. *think some more* Those days are a blur and I haven't used it since then.. Err..
Eventually I said that it's the way that the position of something in relation to the background appears to change depending on the angle you view it from. Like when you make something disappear behind your hand by closing one eye, then the other. Something about stars and how far away they are.
Gosh, maybe some of that stuff did sink in...
In other news, I haven't heard anything about the job yet. I've sort of managed to convince myself that I probably won't get it, which is silly but safe in terms of dashed expectations and such. By this time tomorrow I will know.